I get the migraine aura, flashing lights, when my blood sugars are low, and did years before the diabetes diagnosis too.
I was looking at the thread
@Brunneria wrote on this the other day, about reactive hypoglycaemia and it leading to diabetes, and thinking 'that was me'. Sorry, wandering a bit there

I wonder if you're getting 'lows' because of the hard dieting and maximum control you've gained over the diabetes? Just a thought. xx Debs